The Wealth of Nations by Part 4 Chapter 5 Page 10

commodity. The corn bounty, it is to be observed, as well as every other bounty upon exportation, imposes two different taxes upon the people; first, the tax which they are obliged to contribute in order to pay the bounty; and secondly, the tax which arises from the advanced price of the commodity in the home market, and which, as the whole body of the people are purchasers of corn, must, in this particular commodity, be paid by the whole body of the people.

In this particular commodity, therefore, this second tax is by much the heavier of the two. Let us suppose that, taking one year with another, the bounty of five shillings upon the exportation of the quarter of wheat raises the price of that commodity in the home market only sixpence the bushel, or four shillings the quarter, higher than it otherwise would have been